Yes, didn't think of that. For what it's worth, my lenses are from Smith and are glass.

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I have seen the affect on Camera LCD displays. Some will be polarized completely black if I wear my prescription polarized sunglasses. I have to lift them up to chimp the image. Not noticed it on my HJC I-33 face shield though. I usually use the drop down sun visor with my riding glasses (Wiley X) with clear lenses.